Pauline Potter of Sacramento, California, told Guinness World Records she laid claim to the title of World's Heaviest Living Woman because she "was tired of being this size," and "wanted to get my story out there so that a doctor or nutritionist could help me."

The then-643-pound 47-year-old did ultimately received the help she sought, but from an unexpected source: Her ex-husband Alex.

Potter told Closer magazine that, after seeing a photo of her in Guinness World Records last year, Alex, from whom she divorced three years ago, got back in touch, and the two have been engaging in weight shedding "marathon sex sessions" ever since.

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"I can't move much in bed, but I burn 500 calories a session-it's great exercise just jiggling around," she told the tabloid.

Potter says their "sexercise" sessions occur multiple times a day, and she's already lost dozens of pounds on her way to a target weight of 532.

Though she no longer consumes 10,000 calories a day, Potter said she "still eats Big Macs," though now she chooses "between fries or nuggets" instead of having both. "I tell Alex he needs to visit more so he can help me shed the pounds quicker!"